Vertical Resolution:
Seismic
resolution is a measure of how large an object need to be in order to
be seen in seismic section. Vertical resolution is derived from the
length of the sound wave and layers can be discerned (recognize) when
their thickness is below 1/4 wavelength. still, you can detect layers
down to 1/32 wavelength. When referring to vertical resolution, it is
normally the 1/4 wavelength.
Example1:- In a reflection survey involving a signal with a dominant frequency of 50 Hz propagating in a sedimentary strata with a velocity of 2 km/s , then what is the vertical resolution?
Solution:
Frequency
(f) = 50 Hz
velocity
(v) = 2000m/s
The
relation between velocity, frequency and
wavelength is
wavelength is
c=
f*λ -------------------(1)
λ=
v/ f
λ=
2000 / 50
λ=
40 m
Vertical
resolution = λ / 4
=
40 / 4
=
10 m
Therefore,
vertical resolution not better than 10m
Reference:
https://folk.uio.no/hanakrem/svalex/E-learning/geophysics/Seismic_resolution.pdf
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